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Posted 24 Jun 2002

Dynamic Webcam Image

, 24 Jun 2002
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Streaming Dynamic Images from your webcam into your web pages.
<!-- Download Links -->



This project presents the way to dynamically generate a picture with C# and ASP.NET. Basically a browser points to your page and gets back a picture grabbed on your webcam.

You will be able to access your webcam by placing a HTML IMG tag on your webpage. The picture at the top is an example of usage.

To be able to use the webcam you need to register with regsvr32 the COM Dll CamServer.dll in the 'COM Component' directory.


The first thing to do to get a picture from an ASP.NET page is to determine the MIME file type that the file will handle. In our case the MIME type is JPEG. So we define in the ContentType of the Page:

<%@ Page Language="c#" ContentType="image/jpeg" %>
We also need to specify at the top of the page the namespace that will be used:
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<%@ Import Namespace="System.Net" %>
Then comes the code that will grab the image from the wbecam and returns it to the client:
<script language="C#" runat="server">

protected void Page_Load(object sender, EventArgs e)
    //Jpeg compression quality
    short nQuality = 45;

    //Shout a picture from my webcam
    CAMSERVERLib.Camera cam = new CAMSERVERLib.CameraClass();

    byte[] picture = (byte[])cam.GrabFrame( nQuality );

    //Add the hour to the jpeg picture
    MemoryStream ms = new MemoryStream( picture );
    Bitmap bmp = new Bitmap( ms );

    Graphics g = Graphics.FromImage( bmp );

    string strDate = DateTime.Now.ToLongDateString() + " - " + 

	StringFormat drawFormat = new StringFormat();
    drawFormat.Alignment = StringAlignment.Center;

    g.DrawString(   strDate,
                    new Font( FontFamily.GenericSansSerif, 12 ),
                    new SolidBrush( Color.Black ), 
                    new RectangleF( 1,1,320,240 ),

    g.DrawString(   strDate,
                    new Font( FontFamily.GenericSansSerif, 12 ),
                    new SolidBrush( Color.White ), 
                    new RectangleF( 0,0,320,240 ),

    //Get codecs
    ImageCodecInfo[] icf = ImageCodecInfo.GetImageEncoders();

    EncoderParameters encps = new EncoderParameters( 1 );
    EncoderParameter encp = new EncoderParameter( System.Drawing.Imaging.Encoder.Quality, 
                                                  (long) nQuality );

    //Set quality
    encps.Param[0] = encp;

    bmp.Save( Response.OutputStream, icf[1], encps );
In the code there is nothing new, compared to the other articles. We get a jpeg picture grabbed by the webcam using COM Interop. We add the hour and the little difference is that the image stream is saved to Response.OutputStream .


You may reference the ASP.NET page has a normal jpeg picture:

<img src="http://XXX/WebcamPicture/WebForm1.aspx" width="320" height="240"/>
or in a ASP:Image control.


This opens lots of possibilities in the creation of dynamic graphics. For example you may create dynamic charts linked to database values returned has a normal graphic in a presentation page. You may also make easily a visit counter for your pages...

Known Issues

  • None.


Version 1.00 June 14, 2002
First release.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Laurent Kempé
France France

Laurent Kempé is the editor, founder, and primary contributor of Tech Head Brothers, a French portal about Microsoft .NET technologies.

He is currently employed by Innoveo Solutions since 10/2007 as a Senior Solution Architect and certified Scrum Master.

Founder, owner and Managing Partner of Jobping, which provides a unique and efficient platform for connecting Microsoft skilled job seekers with employers using Microsoft technologies.

Laurent is awarded by Microsoft since Avril 2002: Most Valuable Professional (MVP).

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Comments and Discussions

GeneralVirus Found Pin
scienty775-Jan-10 22:59
memberscienty775-Jan-10 22:59 
GeneralRe: Virus Found Pin
Laurent Kempé5-Jan-10 23:19
memberLaurent Kempé5-Jan-10 23:19 
GeneralBlank Image Show Pin
piyush.sabla@e-connectsolutions.com28-Nov-09 1:34
memberpiyush.sabla@e-connectsolutions.com28-Nov-09 1:34 
GeneralRe: Blank Image Show Pin
puneetisonfire8917-Oct-11 21:27
memberpuneetisonfire8917-Oct-11 21:27 
GeneralRetrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
ajau.jain23-Nov-09 3:38
memberajau.jain23-Nov-09 3:38 
GeneralRe: Retrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
puneetisonfire8917-Oct-11 21:00
memberpuneetisonfire8917-Oct-11 21:00 
QuestionERROR GrabFrame() Pin
selvakumarbt24-Aug-09 2:10
memberselvakumarbt24-Aug-09 2:10 
AnswerRe: ERROR GrabFrame() Pin
roshilkdecs30-Sep-09 23:09
memberroshilkdecs30-Sep-09 23:09 
I also facing the same problem..can anyone help us...
GeneralStoring in database Pin
Member 33558209-Apr-09 22:17
memberMember 33558209-Apr-09 22:17 
General[My vote of 1] hi need help Pin
firas_maher8-Apr-09 23:58
memberfiras_maher8-Apr-09 23:58 
QuestionWebcam: Registering CamServer.dll Pin
Tushar.Johri14-Nov-08 13:55
memberTushar.Johri14-Nov-08 13:55 
Questionstoring the images Pin
jajjssddd23-Sep-08 22:12
memberjajjssddd23-Sep-08 22:12 
GeneralThanks Pin
Fastfootskater12-Jul-08 7:55
memberFastfootskater12-Jul-08 7:55 
GeneralPanda Software alert of virus on the project Pin
nick716-May-08 19:31
membernick716-May-08 19:31 
GeneralRe: Panda Software alert of virus on the project Pin
Laurent Kempé6-May-08 23:27
memberLaurent Kempé6-May-08 23:27 
Generalregister the dll Pin
riccardodaria28-Apr-08 6:43
memberriccardodaria28-Apr-08 6:43 
Questionhow to this capture image in database Pin
mastermehta26-Feb-08 22:00
membermastermehta26-Feb-08 22:00 
Generalneed capture the photo in client system Pin
arumguavel24-Feb-08 20:36
memberarumguavel24-Feb-08 20:36 
GeneralRe: need capture the photo in client system Pin
venkeeyy14-Apr-08 22:26
membervenkeeyy14-Apr-08 22:26 
Generalwant to check web cam connect or not Pin
arumguavel30-Jan-08 19:07
memberarumguavel30-Jan-08 19:07 
Generalhelp Pin
izzettamer2-Oct-07 2:14
memberizzettamer2-Oct-07 2:14 
GeneralRe: help Pin
daldal13-Oct-07 8:35
memberdaldal13-Oct-07 8:35 
GeneralERROR GrabFrame(). Pin
Hariom narayan20-Jul-07 2:21
memberHariom narayan20-Jul-07 2:21 
GeneralRe: ERROR GrabFrame(). Pin
shamaaaaaaaaaaaaaa26-Apr-08 3:30
membershamaaaaaaaaaaaaaa26-Apr-08 3:30 
GeneralRe: ERROR GrabFrame(). Pin
Member 57512753-Dec-08 22:46
memberMember 57512753-Dec-08 22:46 

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